get-running-async-tasks.diff

Enable re-entrance for `WidgetTester.runAsyncEnhanced`
(`ExtWidgetTesterPump` in `flutter_convenient_test/packages/convenient_test_dev/lib/src/functions/widget_tester.dart`)

see also https://github.com/fzyzcjy/flutter_convenient_test/issues/337

this diff is based on flutter v3.22.2

diff --git a/packages/flutter_test/lib/src/binding.dart b/packages/flutter_test/lib/src/binding.dart
index 95a80d2..be8ba34 100644
--- a/packages/flutter_test/lib/src/binding.dart
+++ b/packages/flutter_test/lib/src/binding.dart
@@ -414,6 +414,8 @@ abstract class TestWidgetsFlutterBinding extends BindingBase
   /// [LiveTestWidgetsFlutterBinding] (tests running using `flutter run`).
   test_package.Timeout get defaultTestTimeout;
 
+  bool get runningAsyncTasks; // NOTE MODIFIED add
+
   /// The current time.
   ///
   /// In the automated test environment (`flutter test`), this is a fake clock
@@ -1230,6 +1232,8 @@ class AutomatedTestWidgetsFlutterBinding extends TestWidgetsFlutterBinding {
   FakeAsync? _currentFakeAsync; // set in runTest; cleared in postTest
   Completer<void>? _pendingAsyncTasks;
 
+  bool get runningAsyncTasks => _pendingAsyncTasks != null; // NOTE MODIFIED add
+
   @override
   Clock get clock {
     assert(inTest);
@@ -1722,6 +1726,8 @@ class LiveTestWidgetsFlutterBinding extends TestWidgetsFlutterBinding {
   bool _viewNeedsPaint = false;
   bool _runningAsyncTasks = false;
 
+  bool get runningAsyncTasks => _runningAsyncTasks; // NOTE MODIFIED add
+
   /// The strategy for [pump]ing and requesting new frames.
   ///
   /// The policy decides whether [pump] (with a duration) pumps a single frame